The State Government figures show that out of 4619 drivers pulled over, one in 73 tested positive to either cannabis or methamphetamines. This compared to an average of one in 250 drivers testing positive for alcohol. The results surprised police.

The results come just two days after research by the National Drug and Alcohol Research Centre showed 57 per cent of clubbers admitted driving under the influence of alcohol and 52 per cent under the influence of cannabis. The VicRoads-commissioned study reported that just under half of those surveyed admitted driving soon after taking other drugs.

43% said they had taken ecstasy and 42 % speed.